-er a-a a-c a-t aaa aac aae aag aam aao aar aas aat ac- aca acc ace acg acm aco acr acs act aea aec aee aeg aem aeo aer aes aet ag- aga agc age agg agm ago agr ags agt ama amc ame amg amm amo amr ams amt aoa aoc aoe aog aom aoo aor aos aot ar- ara arc are arg arm aro arr ars art as- asa asc ase asg asm aso asr ass ast at- ata atc ate atg atm ato atr ats att c-- caa cac cae cag cam cao car cas cat cca ccc cce ccg ccm cco ccr ccs cct ce- cea cec cee ceg cem ceo cer ces cet cga cgc cge cgg cgm cgo cgr cgs cgt cma cmc cme cmg cmm cmo cmr cms cmt co- coa coc coe cog com coo cor cos cot cra crc cre crg crm cro crr crs crt csa csc cse csg csm cso csr css cst cta ctc cte ctg ctm cto ctr cts ctt eaa eac eae eag eam eao ear eas eat ec- eca ecc ece ecg ecm eco ecr ecs ect eea eec eee eeg eem eeo eer ees eet ega egc ege egg egm ego egr egs egt em- ema emc eme emg emm emo emr ems emt eo- eoa eoc eoe eog eom eoo eor eos eot era erc ere erg erm ero err ers ert es- esa esc ese esg esm eso esr ess est eta etc ete etg etm eto etr ets ett gaa gac gae gag gam gao gar gas gat gca gcc gce gcg gcm gco gcr gcs gct ge- gea gec gee geg gem geo ger ges get gga ggc ggg ggm ggo ggr ggs ggt gma gmc gme gmg gmm gmo gmr gms gmt goa goc goe gog gom goo gor gos got gra grc gre grg grm gro grr grs grt gsa gsc gse gsg gsm gso gsr gss gst gta gtc gte gtg gtm gto gtr gts gtt m-o m-r maa mac mae mag mam mao mar mas mat mc- mca mcc mce mcg mcm mco mcr mcs mct mea mec mee meg mem meo mer mes met mga mgc mge mgm mgo mgr mgs mgt mma mmc mme mmg mmm mmo mmr mms mmt moa moc moe mog mom moo mor mos mot mra mrc mre mrg mrm mro mrr mrs mrt msa msc mse msg msm mso msr mss mst mta mtc mte mtg mtm mto mtr mts mtt oaa oac oae oag oam oao oar oas oat oc- oca occ ocg ocm oco ocr ocs oct oea oec oee oeg oem oeo oer oes oet oga ogc oge ogg ogo ogs ogt om- oma omc ome omg omm omo omr oms omt oo- ooa ooc oog oom ooo oor oos oot or- ora orc ore org orm oro orr ors ort os- osa osc ose osg osm oso osr oss ost ot- ota otc ote otg otm oto otr ots ott ra- raa rac rae rag ram rao rar ras rat rca rcc rce rcg rcm rco rcr rcs rct re- rea rec ree reg rem reo rer res ret rga rgc rge rgg rgo rgr rgs rgt rma rmc rme rmg rmm rmo rmr rms rmt roa roc roe rog rom roo ror ros rot rra rrc rrg rrm rrr rrs rrt rsa rsc rse rsg rsm rso rsr rss rst rta rtc rte rtg rtm rto rtr rts rtt saa sac sae sag sam sao sar sas sat sca scc sce scg scm sco scr scs sct se- sea sec see seg sem seo ser ses set sga sgc sge sgg sgm sgo sgr sgs sgt sma smc sme smg smm smo smr sms smt soa soc soe sog som soo sor sos sot sr- sra src sre srg srm sro srr srs srt ss- ssa ssc sse ssg ssm sso ssr sss sst sta stc ste stg stm sto str sts stt taa tac tae tag tam tao tar tas tat tca tcc tce tcg tcm tco tcr tcs tct te- tea tec tee teg tem teo ter tes tet tga tgc tge tgg tgm tgo tgr tgs tgt tma tmc tme tmg tmm tmo tmr tms tmt to- toa toc toe tog tom too tor tos tot tra trc tre trg trm tro trr trs trt tsa tsc tse tsg tsm tso tsr tss tst tta ttc tte ttg ttm tto ttr tts ttt